CN105278750A - Touch input apparatus - Google Patents

Touch input apparatus Download PDF

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Publication number
CN105278750A
CN105278750A CN201510703555.7A CN201510703555A CN105278750A CN 105278750 A CN105278750 A CN 105278750A CN 201510703555 A CN201510703555 A CN 201510703555A CN 105278750 A CN105278750 A CN 105278750A
Authority
CN
China
Prior art keywords
touch
electrode
touch input
display module
circuit board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510703555.7A
Other languages
Chinese (zh)
Inventor
金世晔
尹相植
权顺荣
文皓俊
金泰勳
金本冀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi Dipu Co
Hideep Inc
Original Assignee
Xi Dipu Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xi Dipu Co filed Critical Xi Dipu Co
Publication of CN105278750A publication Critical patent/CN105278750A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0447—Position sensing using the local deformation of sensor cells
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Position Input By Displaying (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

The invention discloses a touch input apparatus that can detect the touch pressured applied on the touch surface, and the touch input apparatus comprises a substrate; a display module comprising a display plate; and an electrode that is set between the substrate and the display plate for fixing the substrate and the display module, wherein, the distance between the electrode and the substrate or between the electrode and the display module can change with the touch on the touch surface; the distance can change with the volume of the touch pressure; the electrode can output an electronic signal corresponding to the change of the distance. According to the touch input apparatus, not only the touch position can be detected, the volume of the touch pressure can be detected.

Description

Touch input device
Technical field
The present invention relates to touch input device, particularly relate to and a kind ofly comprise display module and the touch input device of touch location and touch pressure size can be detected.
Background technology
Input media for Operations Computing System has polytype.Such as, the input media of button (button), key (key), operating rod (joystick) and touch-screen and so on.Because touch-screen is simple to operation, therefore the utilization factor of touch-screen in Operations Computing System increases.
Touch-screen can form the touch-surface of the touch input device comprising touch-sensing plate (touchsensorpanel), and wherein touch-sensing plate can be the transparent panel with touch-sensitive surface (touch-sensitivesurface).This touch-sensing plate is attached to before display screen, and touch-sensitive surface can to cover in display screen observable.User's fingers etc. touch merely touch-screen and get final product Operations Computing System.Usually, the touch on computational system identification touch-screen and touch location also resolve this touch, thus correspondingly can perform computing.
Therefore, need a kind of touch location that can not only detect touch-screen and be subject to when touching while not reducing display module performance, and the touch input device of touch pressure size can be detected.
Summary of the invention
Technical matters
The object of the present invention is to provide and a kind ofly can detect the touch location on touch-screen and the touch input device comprising display module of touch pressure size can be detected.
Another object of the present invention is to provide one can detect the touch input device comprising display module of touch location and touch pressure size while not reducing display module sharpness (visibility) and light transmission rate.
Another object of the present invention is the touch input device providing a kind of touch pressure size detection degree of accuracy higher.
Technical scheme
The touch input device that can detect the touch pressure putting on touch-surface according to the embodiment of the present invention comprises: substrate; Display module, it comprises display board; And electrode, it is between described substrate and described display board and be fixed on described substrate, wherein, the described touch that distance between described electrode and described substrate can be subject to because of described touch-surface and changing, described distance can with the size variation of described touch pressure, and described electrode can export the electronic signal of the change corresponding to described distance.
The touch input device that can detect the touch pressure putting on touch-surface according to another embodiment of the present invention comprises: substrate; Display module, it comprises display board; And electrode, it is between described substrate and described display board and be fixed on described display module, wherein, the described touch that distance between described electrode and described display module can be subject to because of described touch-surface and changing, described distance can with the size variation of described touch pressure, and described electrode can export the electronic signal of the change corresponding to described distance.
According to further embodiment of this invention, described electrode can form multiple channel, and, the multiple pressure of described multiple Channel Detection multi-touch can be utilized.
According to further embodiment of this invention, described display module can bend with described touch, and the distance between described electrode and described substrate or between described electrode and described display module can bend with described display module and change.
Technique effect
The invention provides and a kind ofly can detect the touch location on touch-screen and the touch input device comprising display module of touch pressure size can be detected.
Further, the invention provides the touch input device comprising display module that one can detect touch location and touch pressure size while not reducing display module sharpness (visibility) and light transmission rate.
Further, the invention provides the higher touch input device of a kind of touch pressure size detection degree of accuracy.
Accompanying drawing explanation
Fig. 1 is according to the capacitive touch sensing plate of the embodiment of the present invention and the concise and to the point figure of formation performing its action;
Fig. 2 a, Fig. 2 b and Fig. 2 c are the concept map of display according to the relative position of display module and touch-sensing plate in the touch input device of the embodiment of the present invention;
Fig. 3 is the sectional view with the touch input device of the structure that can detect touch location and touch pressure according to a first embodiment of the present invention;
Fig. 4 a is the sectional view of touch input device according to a second embodiment of the present invention;
Fig. 4 b is the stereographic map of display touch input device according to a second embodiment of the present invention;
Fig. 5 a is the citing sectional view of the electrode slice of the pressure electrode of the touch input device comprised for attachment to second embodiment of the invention;
Fig. 5 b is that electrode slice is attached to the part sectioned view of the touch input device on touch input device according to the first method;
Fig. 5 c is the planimetric map of the electrode slice being attached to touch input device according to the first method;
Fig. 5 d is that electrode slice is attached to the part sectioned view of the touch input device on touch input device according to the second method;
Fig. 6 a is the sectional view comprising the touch input device of pressure electrode pattern according to a first embodiment of the present invention;
The sectional view of the situation that Fig. 6 b is under pressure for touch input device shown in Fig. 6 a;
Fig. 6 c is the sectional view comprising the touch input device of pressure electrode pattern according to a second embodiment of the present invention;
The sectional view of the situation that Fig. 6 d is under pressure for touch input device shown in Fig. 6 c;
Fig. 6 e to Fig. 6 h is the schematic diagram of the pressure electrode pattern that can be applicable to the first embodiment of the present invention and the second embodiment respectively;
Fig. 7 a and Fig. 7 b is the schematic diagram of the relation between the touch pressure size that is subject to of touch input device of the present invention and saturated area;
In Fig. 8, (a) and (b) is the sectional view of another electrode slice of the pressure electrode of the touch input device comprised for attachment to second embodiment of the invention;
Fig. 9 a and Fig. 9 b shows the adherence method of pressure electrode according to a second embodiment of the present invention;
Figure 10 a to Figure 10 c shows method pressure electrode being connected to touch-sensing circuit according to a second embodiment of the present invention;
Figure 11 a to Figure 11 c shows the situation forming multiple channel according to the pressure electrode of the embodiment of the present invention;
Figure 12 is display obtains corresponding to the capacitance change of object grammes per square metre according to the experiment of the touch-surface central part of the touch input device 1000 of embodiment of the present invention coordinate diagram by non-conductive object pressurization.
Description of reference numerals
1000: touch input device 100: touch-sensing plate
120: drive division 110: detecting part
130: control part 200: display module
300: substrate 400: pressure detection module
420: separation layer 450,460: pressure electrode
Specific embodiment
Accompanying drawing below by way of display specific embodiment of the present invention is specifically described the present invention.Guarantee that those of ordinary skill in the art are enough to implement the present invention by illustrating.Though various embodiments of the present invention is different, not mutually repel.Such as, the given shape recorded in instructions, structure and characteristic can be realized by other embodiments under the prerequisite not exceeding technical solution of the present invention and scope.In addition, the position of the indivedual inscapes in disclosed each embodiment or be configured in do not exceed technical solution of the present invention and scope prerequisite under can change enforcement.Therefore, below illustrate not to be defined as object, the words therefore definitely defining scope of the present invention are only limitted to all scopes be equal to the scope described in technical scheme.Reference numeral similar in accompanying drawing represents same or similar function in every respect.
Referring to accompanying drawing, the touch input device according to the embodiment of the present invention is described.Below citing illustrates capacitive touch-sensing plate 100 and pressure detection module 400, but also can be suitable for touch-sensing plate 100 and the pressure detection module 400 that can be detected touch location and/or touch pressure by any-mode.
Fig. 1 is according to the capacitive touch-sensing plate 100 of the embodiment of the present invention and the concise and to the point figure of formation performing its action.With reference to Fig. 1, multiple drive electrode TX1 to TXn and multiple receiving electrode RX1 to RXm is comprised according to the touch-sensing plate 100 of the embodiment of the present invention, drive division 120 and detecting part 110 can be comprised, wherein drive division 120 applies drive singal in order to the action of described touch-sensing plate 100 to described multiple drive electrode TX1 to TXn, and detecting part 110 receives the sensing signal of the capacitance change information changed when the touch-surface comprising touch-sensing plate 100 is subject to touching to detect touch and touch location.
As shown in Figure 1, touch-sensing plate 100 can comprise multiple drive electrode TX1 to TXn and multiple receiving electrode RX1 to RXm.Multiple drive electrode TX1 to TXn that Fig. 1 shows touch-sensing plate 100 forms orthogonal array with multiple receiving electrode RX1 to RXm, but the present invention is not limited thereto, the dimension and applying that multiple drive electrode TX1 to TXn and multiple receiving electrode RX1 to RXm can form the Arbitrary Digits such as diagonal line, concentric circles or three-dimensional random arrangement arranges.Wherein n and m is positive integer, and both values can be identical or different, and size can be different because of embodiment.
As shown in Figure 1, multiple drive electrode TX1 to TXn and multiple receiving electrode RX1 to RXm can be arranged in and mutually intersect respectively.Drive electrode TX comprises the multiple drive electrode TX1 to TXn extended to the first direction of principal axis, and receiving electrode RX can comprise the multiple receiving electrode RX1 to RXm to intersecting at the first axial second direction of principal axis prolongation.
According in the touch-sensing plate 100 of the embodiment of the present invention, multiple drive electrode TX1 to TXn can be formed at identical layer with multiple receiving electrode RX1 to RXm.Such as, multiple drive electrode TX1 to TXn and multiple receiving electrode RX1 to RXm can be formed at the same face of dielectric film (not shown).Further, multiple drive electrode TX1 to TXn also can be formed at different layers from multiple receiving electrode RX1 to RXm.Such as, multiple drive electrode TX1 to TXn and multiple receiving electrode RX1 to RXm also can be formed at the two sides of a dielectric film (not shown) respectively, or, multiple drive electrode TX1 to TXn is formed at the one side of the first dielectric film (not shown), and multiple receiving electrode RX1 to RXm is formed at the one side of the second dielectric film (not shown) being different from described first dielectric film.
Multiple drive electrode TX1 to TXn and multiple receiving electrode RX1 to RXm can by the transparent conductive material (indium tin oxide (IndiumTinOxide such as, be made up of tin ash (SnO2) and indium oxide (In2O3) etc.; Or antimony tin (AntimonyTinOxide ITO); The formation such as ATO)).But this is citing just, and drive electrode TX and receiving electrode RX also can be formed by other transparent conductive material or nontransparent conductive materials.Such as, drive electrode TX and receiving electrode RX can by comprising Yin Mo (silverink), copper (copper) and carbon nano-tube (CarbonNanotube; CNT) in, the material of at least one is formed.Further, drive electrode TX and receiving electrode RX can adopt wire netting (metalmesh) or be made up of Nano Silver (nanosilver) material.
Drive division 120 according to the embodiment of the present invention can apply drive singal to drive electrode TX1 to TXn.According to embodiments of the invention, the mode that drive singal can once apply to a drive electrode is applied to the first drive electrode TX1 to the n-th drive electrode TXn successively.The process of above-mentioned applying drive singal can repeat again.But this is citing just, in other embodiments, drive singal can be applied to multiple drive electrode simultaneously.
Whether and touch location detecting part 110 can receive by receiving electrode RX1 to RXm the sensing signal comprised about the information being applied in the electric capacity (Cm) 101 generated between the drive electrode TX1 to TXn of drive singal and receiving electrode RX1 to RXm, detect touch with this.Such as, sensing signal can be the signal that the drive singal being applied to drive electrode TX is coupled by the electric capacity (Cm) 101 generated between drive electrode TX with receiving electrode RX.As above, the process being put on the drive singal of the first drive electrode TX1 to the n-th drive electrode TXn by receiving electrode RX1 to RXm sensing can be called scanning (scan) touch-sensing plate 100.
Such as, detecting part 110 can comprise the receiver (not shown) be connected by switch with each receiving electrode RX1 to RXm.Described switch is opened (on) at the time interval of the signal of the corresponding receiving electrode RX of sensing and is made receiver can sense sensing signal from receiving electrode RX.Receiver can comprise amplifier (not shown) and be incorporated into the feedback condenser bearing i.e. feedback path between (-) input end and the output terminal of amplifier of amplifier.Herein, just (+) input end of amplifier can be connected with ground connection (ground).Further, receiver can also comprise the reset switch in parallel with feedback condenser.Reset switch can be resetted to the conversion from electric current to voltage performed by receiver.The negative input end of amplifier is connected to corresponding receiving electrode RX, becomes voltage after can receiving the current signal containing electric capacity (Cm) 101 information by Integral Transformation.Detecting part 110 can also comprise the analog to digital converter (analogtodigitalconverter data of the integration through receiver being converted to numerical data; Hereinafter referred to as ' ADC ', not shown).Numerical data is input to processor (not shown) subsequently, then by processing for obtaining the touch information about touch-sensing plate 100.Detecting part 110 can also comprise ADC and processor while comprising receiver.
Control part 130 can perform the function of the action controlling drive division 120 and detecting part 110.Such as, control part 130 sends to drive division 120 to make drive singal can be applied in the schedule time drive electrode TX preset after can generating drive control signal.Further, control part 130 sends to detecting part 110 to make detecting part 110 receive sensing signal in the schedule time from the receiving electrode RX preset and also performs the function preset after can generating sensing control signal.
In Fig. 1, to the touch of the touch-sensing plate 100 of the embodiment of the present invention whether and the touch detecting apparatus (not marking) of touch location drive division 120 and detecting part 110 can form and can sense.Touch detecting apparatus according to the embodiment of the present invention can also comprise control part 130.Can be integrated in the touch input device 1000 comprising touch-sensing plate 100 on the touch-sensing IC (in touchsensingIntegratedCircuit: Figure 10 a to Figure 10 c 150) as touch-sensing circuit according to the touch detecting apparatus of the embodiment of the present invention.Drive electrode TX in touch-sensing plate 100 and receiving electrode RX such as can pass through conducting wire (conductivetrace) and/or the conductive pattern (conductivepattern) etc. be printed on circuit board and be connected to drive division 120 in touch-sensing IC150 and detecting part 110.Touch-sensing IC150 can be positioned at the circuit board being printed with conductive pattern, such as, with on 160 the first printed circuit board (PCB)s represented (hereinafter referred to as the ' the one PCB ') in Figure 10 a to Figure 10 c.According to embodiment, touch-sensing IC150 can be assemblied in the mainboard (mainboard) worked for touch input device 1000.
As mentioned above, each point of crossing of drive electrode TX and receiving electrode RX generates the electric capacity Cm of predetermined value, and the value of object this electric capacity when touch-sensing plate 100 of finger and so on can change.Electric capacity described in Fig. 1 can represent mutual capacitance Cm.By this electrology characteristic of sensing sensing to the touch of touch-sensing plate 100 whether and/or touch location detecting part 110 can.Such as, to the touch on the surface of the touch-sensing plate 100 that the two dimensional surface be made up of the first axle and the second axle is formed whether and/or its position can sense.
Further, the second axial touch location can be detected by detecting the drive electrode TX being applied in drive singal when touch-sensing plate 100 is subject to touching.Equally, when touch-sensing plate 100 is subject to touching, from the Received signal strength Detection capacitance change received by receiving electrode RX, the first axial touch location can be detected with this.
Touch-sensing plate 100 is specifically illustrated above for the touch-sensing plate of mutual capacitance type, but according in the touch input device 1000 of the embodiment of the present invention, for detect touch whether and the touch-sensing plate 100 of touch location in addition to the method described above can also by self-capacitance mode, surface capacitance mode, projection (projected) capacitive way, resistive film mode, surface acoustic wave mode (surfaceacousticwave; SAW), the arbitrary touch-sensing mode such as infrared ray (infrared) mode, optical imaging modalities (opticalimaging), decentralized signaling (dispersivesignaltechnology) and acoustic pulse recognition (acousticpulserecognition) mode realizes.
According in the touch input device 1000 of the embodiment of the present invention, the touch-sensing plate 100 for detecting touch location can be positioned at the outside or inside of display module 200.
Can be contained in liquid crystal indicator (LiquidCrystalDisplay according to the display module 200 of the touch input device 1000 of the embodiment of the present invention; LCD), plasma display panel (PlasmaDisplayPanel; PDP), organic light-emitting display device (OrganicLightEmittingDiode; Etc. OLED) display board.Therefore, user can visually confirm the picture that display board shows while touch input to touch-surface.Herein, display module 200 can comprise control circuit, and this control circuit controls to make from the CPU (central processing unit) the mainboard (mainboard) worked for touch input device 1000 and CPU (centralprocessingunit) or application processor (applicationprocessor; Etc. AP) input is received and the required content of display on the display panel.This control circuit can be assemblied on the second printed circuit board (PCB) (hereinafter referred to as the 2nd PCB) 210 in Fig. 9 a to Figure 10 c.Herein, the control circuit worked for display module 200 can comprise display board control IC, pattern control IC (graphiccontrollerIC) and other display modules 200 and to work required circuit.
Fig. 2 a, Fig. 2 b and Fig. 2 c are the concept map of display according to the relative position of display module and touch-sensing plate in the touch input device of the embodiment of the present invention.The display board that Fig. 2 a to Fig. 2 c shows is LCD plate, but this is only citing, in fact can be suitable for arbitrary display board according to the touch input device 1000 of the embodiment of the present invention.
In present specification, Reference numeral 200 represents display module, but Fig. 2 a to Fig. 2 c and illustrate in Reference numeral 200 not only represent display module, can also display board be represented.As shown in Fig. 2 a to Fig. 2 c, LCD plate can comprise there is liquid crystal cell (liquidcrystalcell) liquid crystal layer 250, first glassy layer 261 comprising electrode at liquid crystal layer 250 two ends and the second glassy layer 262, with described liquid crystal layer 250 relative direction on and be positioned at the first polarizing layer 271 of the one side of described first glassy layer 261 and be positioned at second polarizing layer 272 of one side of described second glassy layer 262.For performing Presentation Function, LCD plate can also comprise other and forms and can be out of shape enforcement, and this is the common practise of those skilled in the art.
Fig. 2 a touch-sensing plate 100 shown in touch input device 1000 is configured at the situation of display module 200 outside.The touch-surface of touch input device 1000 can be the upper face of touch-sensing plate 100.Can be able to be the upper side of touch-sensing plate 100 as the face of the touch-sensing plate 100 of touch-surface in Fig. 2 a.And according to embodiment, the touch-surface of touch input device 1000 can be the outside of display module 200.In Fig. 2 a, the outside that can become the display module 200 of touch-surface can be the bottom surfaces of the second polarizing layer 272 of display module 200.Be protection display module 200 herein, the bottom surfaces of display module 200 can be covered with the overlayer (not shown) of glass and so on.
Fig. 2 b and 2c touch-sensing plate 100 shown in touch input device 1000 is configured at the situation of display module 200 inside.Herein, the touch-sensing plate 100 for detecting touch location in Fig. 2 b is configured between the first glassy layer 261 and the first polarizing layer 271.Herein, the touch-surface of touch input device 1000 is outsides of display module 200, can be upper side or bottom surfaces in figure 2b.Fig. 2 c shows the situation that liquid crystal layer 250 comprises the touch-sensing plate 100 for detecting touch location.Herein, the touch-surface of touch input device 1000 is outsides of display module 200, can be upper side or bottom surfaces in Fig. 2 c.In Fig. 2 b and Fig. 2 c, can cover with the overlayer (not shown) of glass and so on can as the upper side of the display module 200 of touch-surface or bottom surfaces.
Be explained above and to the touch of the touch-sensing plate 100 according to the embodiment of the present invention whether and/or touch location detect, but utilize and can not only detect touch whether and/or touch location according to the touch-sensing plate 100 of the embodiment of the present invention, the size of touch pressure can also be detected.In addition, the size of the pressure detection module detection touch pressure detecting touch pressure independent of touch-sensing plate 100 can also be comprised.
Fig. 3 is the sectional view with the touch input device of the structure that can detect touch location and touch pressure according to a first embodiment of the present invention.
Comprise in the touch input device 1000 of display module 200 and can be attached to before display module 200 for the touch-sensing plate 100 and pressure detection module 400 detecting touch location.The display screen of display module 200 can be protected like this, and the sensitivity of touch detection of touch-sensing plate 100 can be improved.
Herein, pressure detection module 400 also can work alone with the touch-sensing plate 100 for detecting touch location, such as, pressure detection module 400 can with the detected pressures independently of the touch-sensing plate 100 for detecting touch location.Further, also pressure detection module 400 can be detected touch pressure by the touch-sensing plate 100 be combined in for detecting touch location.Such as, can adopt for detecting the drive electrode TX in the touch-sensing plate 100 of touch location and at least one the electrode detection touch pressure in receiving electrode RX.
Fig. 3 shows pressure detection module 400 and is incorporated into the situation that touch-sensing plate 100 detects touch pressure.In Fig. 3, pressure detection module 400 comprises the separation layer 420 making to be separated by between described touch-sensing plate 100 and display module 200.Pressure detection module 400 can comprise is separated by the reference potential layer of touch-sensing plate 100 by separation layer 420.Herein, display module 200 can play the function of reference potential layer.
Reference potential layer can have any current potential that the electric capacity 101 generated between drive electrode TX and receiving electrode RX can be caused to change.Such as, reference potential layer can be the ground plane with ground connection (ground) current potential.Reference potential layer can be ground connection (ground) layer of display module 200.Herein, reference potential layer can be the plane parallel with the two dimensional surface of touch-sensing plate 100.
As shown in Figure 3, touch-sensing plate 100 is spaced with the display module 200 as reference potential layer.Herein, according to the difference of touch-sensing plate 100 with the adhering method of display module 200, the separation layer 420 between touch-sensing plate 100 and display module 200 can be air gap (airgap).According to embodiment, separation layer 420 can be made up of impact absorbing material.According to embodiment, separation layer 420 can be filled with dielectric material (dielectricmaterial).Herein, double-sided adhesive tape 430 (DoubleAdhesiveTape can be utilized; DAT) fixing touch-sensing plate 100 and display module 200.Such as, touch-sensing plate 100 can be made mutually stacked with the area of display module 200, two layers of touch-sensing plate 100 and each fringe region of display module 200 are bonding by double-sided adhesive tape 430, and touch-sensing plate 100 and all the other regions of display module 200 are separated by predetermined distance d.
Usually, even if do not cause touch-sensing plate 100 to bend to the touch of touch-surface, the electric capacity (Cm) 101 between drive electrode TX and receiving electrode RX still changes.That is, mutual capacitance when touching touch-sensing plate 100 (Cm) 101 can reduce relative to basic mutual capacitance.Its reason be to point wait as conductor object near touch-sensing plate 100 time object play the effect of ground connection (GND), the edge capacitance (fringingcapacitance) of mutual capacitance (Cm) 101 is absorbed by object.When not touching touch-sensing plate 100, basic mutual capacitance is exactly mutual capacitance value between drive electrode TX and receiving electrode RX.
Utilize object to carry out under touch executes stressed situation to the touch-surface of touch-sensing plate 100 and upper face, touch-sensing plate 100 can bend.Herein, the value of the mutual capacitance (Cm) 101 between drive electrode TX and receiving electrode RX can reduce further.Its reason is that touch-sensing plate 100 is bending and causes the distance between touch-sensing plate 100 and reference potential layer to be reduced to d ' from d, and the edge capacitance of therefore described mutual capacitance (Cm) 101 is not only absorbed by object, also can be absorbed by reference potential layer.Touching object is in idioelectric situation, and the distance between left and right touch-sensing plate 100 and reference potential layer changes the change that (d-d ') causes mutual capacitance (Cm).
As mentioned above, touch input device 1000 comprises display module 200 and the touch-sensing plate 100 that is positioned on display module 200 and pressure detection module 400, therefore, it is possible to also detect touch pressure while detection touch location.
But as shown in Figure 3, when touch-sensing plate 100 and pressure detection module 400 are all configured on display module 200, the problem that the display characteristic with display module declines.Especially, when display module 200 top comprises air gap 420, sharpness and the light transmission rate of display module may be reduced.
Therefore in order to prevent this problem, optical cement (OpticallyClearAdhesive can be passed through; And so on OCA) the complete lamination of bonding agent (lamination) touch-sensing plate 100 and display module 200, instead of configuring air gap for detecting between the touch-sensing plate 100 of touch location and display module 200.
Fig. 4 a is the sectional view of touch input device according to a second embodiment of the present invention.Touch input device 1000 according to a second embodiment of the present invention, can be used in by bonding agent the complete lamination between touch-sensing plate 100 and display module 200 detecting touch location.Therefore color clear degree, sharpness and photopermeability that the display module 200 that can improve is provided by the touch-surface of touch-sensing plate 100 shows.
To illustrate in Fig. 4 a, Fig. 4 b and the explanation carried out with reference to this figure that the touch-sensing plate 100 of the touch input device 1000 of form is according to a second embodiment of the present invention attached on display module 200 by bonding agent lamination, but touch input device 1000 according to a second embodiment of the present invention can also comprise the situation that the touch-sensing plate 100 shown in Fig. 2 b and Fig. 2 c etc. is configured in display module 200 inside.Further, Fig. 4 a and Fig. 4 b shows the situation that touch-sensing plate 100 covers display module 200, and touch-sensing plate 100 is positioned at that display module 200 is inner and display module 200 also can as the second embodiment of the present invention by the touch input device 1000 that the overlayer of glass and so on covers.
Mobile phone (cellphone), personal digital assistant (PersonalDataAssistant can be comprised according to the touch input device 1000 of the embodiment of the present invention; PDA), smart mobile phone (smartphone), panel computer (tabletPersonalComputer), MP3 player, notebook computer (notebook) etc. have the electronic installation of touch-screen.
According to the touch input device 1000 of the embodiment of the present invention, substrate 300 such as can play the function of the shell (housing) surrounding the assembly space 310 that holds circuit board and/or the battery worked for touch input device 1000 etc. together with the most gabarit mechanism of touch input device 1000 and housing 320.Herein, the circuit board worked for touch input device 1000 can assemble CPU (central processing unit) (CentralProcessingUnit as mainboard (mainboard); Or application processor (applicationprocessor CPU); AP) etc.Substrate 300 makes display module 200 be separated with the circuit board worked for touch input device 1000 and/or battery, can cut off the electrical noise that display module 200 occurs.
In touch input device 1000, touch-sensing plate 100 or above overlayer can be greater than display module 200, substrate 300 and assembly space 310, therefore can form housing 320 and make housing 320 surround display module 200, substrate 300 and circuit board 310 together with touch-sensing plate 100.
Touch input device 1000 according to a second embodiment of the present invention can detect touch location by touch-sensing plate 100, detects touch pressure by the pressure detection module 400 be configured between display module 200 and substrate 300.Herein, touch-sensing plate 100 can be configured in inside or the outside of display module 200.Such as, pressure detection module can comprise electrode 450,460 (can be called the first electrode 450 and the second electrode 460 below).The electrode 450,460 in pressure detection module 400 can be made to be arranged on touch input device 1000 in electrode slice 440 mode comprising respective electrode, below this to be specifically described.Herein, need to arrange air gap 420 between electrode 450,460 and substrate 300 and/or display module 200, the electrode slice 440 that therefore Fig. 4 a comprises electrode 450,460 is separated by with substrate 300 and display module 200 and is configured.But electrode 450,460 also can be made to contact with one of them in substrate 300 and display module 200.
Fig. 4 b is the stereographic map of touch input device according to a second embodiment of the present invention.As shown in Figure 4 b, pressure detection module 400 can comprise electrode 450 and 460 between display module 200 and substrate 300 in the touch input device 1000 of the embodiment of the present invention.Below in order to clearly distinguish with the electrode being arranged at touch-sensing plate 100, the electrode 450,460 being used for detected pressures is called pressure electrode 450,460 (the first pressure electrode 450 and the second pressure electrode 460 can be called below).Herein, pressure electrode 450,460 is positioned at the back side instead of the front of display board, therefore not only can be formed by transparency material, also can be formed by nontransparent material.
Fig. 5 a is the citing sectional view of the electrode slice of the pressure electrode of the touch input device comprised for attachment to second embodiment of the invention.Such as, electrode slice 440 electrode layer 441 that can comprise the first insulation course 470, second insulation course 471 and be positioned between the two.Electrode layer 441 can comprise the first pressure electrode 450 and/or the second pressure electrode 460.Herein, the first insulation course 470 and the second insulation course 471 (can be called for short insulation course 470,471 below) can be formed by the megohmite insulant of polyimide (polyimide) and so on.The first pressure electrode 450 in electrode layer 441 and the second pressure electrode 460 can comprise the material of copper (copper) and so on.According to the manufacturing process of electrode slice 440, by optical cement (OpticallyClearAdhesive; And so on OCA) the bonding electrode layer 441 of bonding agent (not shown) and the second insulation course 471.And according to embodiment, after the mask (mask) of the through hole had corresponding to pressure electrode pattern can being placed on the first insulation course 470, by spraying conduction spray (spray) mineralization pressure electrode 450,460.Fig. 5 a and following explanation disclose electrode slice 440 structure comprising insulation course 470,471 and be positioned at pressure electrode 450,460 between the two, but this just citing, in fact electrode slice 440 can only include pressure electrode 450,460.
Touch input device 1000 according to a second embodiment of the present invention, can be attached to substrate 300 or display module 200 and and be separated by by separation layer 420, to guarantee to detect touch pressure between substrate 300 or display module 200 by electrode slice 440.
Fig. 5 b is that electrode slice is attached to the part sectioned view of the touch input device on touch input device according to the first method.Fig. 5 b show electrode sheet 440 is attached to the state on substrate 300 or display module 200.
As shown in Figure 5 c, separation layer 420 can be kept by forming the splicing tape 430 with predetermined thickness along the edge of electrode slice 440.All edges of Fig. 5 c show electrode sheet 440 (such as, dimetric all edges) be all formed with the situation of splicing tape 430, but also (such as, dimetric three edges) at least partially only in electrode slice 440 edge can form splicing tape 430.Herein as shown in Figure 5 c, the region comprising pressure electrode 450,460 pattern can not form splicing tape 430.Therefore, when electrode slice 440 being attached to substrate 300 or display module 200 by splicing tape 430, pressure electrode 450,460 and substrate 300 or display module 200 can be separated by a distance.According to embodiment, splicing tape 430 can be formed at the upper side of substrate 300 or the bottom surfaces of display module 200.Further, splicing tape 430 can be double-sided adhesive tape.Fig. 5 c only shows a pressure electrode in pressure electrode 450,460.
Fig. 5 d is that electrode slice is attached to the part sectioned view of the touch input device on touch input device according to the second method.As fig 5d, electrode slice 440 can be configured in after on substrate 300 or display module 200, with splicing tape 431, electrode slice 440 be fixed on substrate 300 or display module 200.Therefore, splicing tape 431 can with at least local and at least localized contact of substrate 300 or display module 200 of electrode slice 440.Fig. 5 d shows splicing tape 431 is connected to substrate 300 or display module 200 exposing surface from the top of electrode slice 440.Herein, can make in splicing tape 431, to only have the side mask contacted with electrode slice 440 to have bonding force.Therefore, in Fig. 5 d, the upper side of splicing tape 431 can not have bonding force.
As fig 5d, even if be fixed on substrate 300 or display module 200 by splicing tape 431 by electrode slice 440, between electrode slice 440 and substrate 300 or display module 200, still predetermined space and air gap can be there is.Its reason is that electrode slice 440 is with between substrate 300 or display module 200 and non-immediate is bonding by bonding agent, and comprises the figuratum pressure electrode 450,460 of tool due to electrode slice 440, and therefore the surface of electrode slice 440 may be uneven.Above-mentioned air gap 420 shown in Fig. 5 d also can as the separation layer for detecting touch pressure.
Below, for the situation that electrode slice 440 is attached on substrate 300 or display module 200 by the first method shown in above-mentioned Fig. 5 b, embodiments of the invention are described, but same explanation can also be applicable to the situation of by any means such as the second methods, electrode slice 440 and substrate 300 or display module 200 being adhered to into state of being separated by.
Fig. 6 a is the sectional view comprising the touch input device of pressure electrode pattern according to a first embodiment of the present invention.As shown in Figure 6 a, according to a first embodiment of the present invention, the electrode slice 440 comprising pressure electrode 450,460 can be adhered on the substrate 300 and make to be formed with the region of pressure electrode 450,460 and substrate 300 is separated by by separation layer 420.Fig. 6 a shows display module 200 and contacts with electrode slice 440, but this to be citing illustrate, in fact display module 200 and electrode slice 440 can be separated by and be configured.
Pressure electrode for detected pressures can comprise the first pressure electrode 450 and the second pressure electrode 460.Herein, one of them can be made in the first pressure electrode 450 and the second pressure electrode 460 for drive electrode, and another is receiving electrode.Can drive singal be applied to drive electrode and obtain sensing signal by receiving electrode.Mutual capacitance can be generated between first pressure electrode 450 and the second pressure electrode 460 during applying voltage.
The sectional view of the situation that Fig. 6 b is under pressure for touch input device 1000 shown in Fig. 6 a.In order to cover noise, substrate 300 can be made to have ground connection (ground) current potential.Under executing stressed situation by object 500 to the surface of touch-sensing plate 100, touch-sensing plate 100 and display module 200 can bend or press down.Herein, because electrode slice 440 presses down, the pressure electrode 450,460 therefore in electrode slice 440 and the distance d between substrate 300 can be reduced to d '.In this case, edge capacitance reduces along with described distance d and is absorbed by substrate 300, and the mutual capacitance therefore between the first pressure electrode 450 and the second pressure electrode 460 can reduce.Therefore, the decrease of mutual capacitance can be obtained and calculate the size of touch pressure with this from the sensing signal obtained by receiving electrode.
According in the touch input device 1000 of the embodiment of the present invention, display module 200 is being executed under stressed touch and can bent.Can at touch location generation maximum distortion when display module 200 bends.According to embodiment, display module 200 position that is bending or generation maximum distortion when pressing down and described touch location can be inconsistent, but the described touch location of display module 200 at least can bend.Such as, touch location is near the position such as gabarit and edge of display module 200 when, bending or that depression degree the is maximum position of display module 200 may not be identical with touch location, but display module 200 at least can bend at described touch location or press down.
As shown in Fig. 6 a and Fig. 6 b, touch input device 1000 according to a first embodiment of the present invention changes by the distance be attached with between the substrate 300 of electrode slice 440 and electrode slice 440 and detects touch pressure.Herein, the distance d between electrode slice 440 and substrate 300 is very little, therefore, even if when being subject to touch pressure, distance d change is very little also still accurately can detect touch pressure.Fig. 6 c is the sectional view comprising the touch input device of pressure electrode of second embodiment of the invention.The electrode slice 440 that first embodiment display comprises pressure electrode 450,460 is formed at the situation on substrate 300, but also pressure electrode 450,460 can be attached to the bottom surfaces of display module 200.
The sectional view of the situation that Fig. 6 d is under pressure for touch input device shown in Fig. 6 c.Herein, display module 200 can have earthing potential.Therefore, distance d when touching the touch-surface of touch-sensing plate 100 between display module 200 and pressure electrode 450,460 reduces, thus the mutual capacitance between the first pressure electrode 450 and the second pressure electrode 460 can be caused to change.
As shown in Fig. 6 c and Fig. 6 d, the touch input device 1000 of second embodiment of the invention can be changed by the distance be attached with between the display module 200 of electrode slice 440 and electrode slice 440 and detects touch pressure.Herein, the distance d between electrode slice 440 and display module 200 is very little, even if distance d change is very trickle when therefore touch pressure causes, also accurately can detect touch pressure in the same old way.
Such as according to embodiment, the distance between display module 200 and electrode slice 440 can be less than the distance between electrode slice 440 and substrate 300.Further, such as electrode slice 440 and as the display module 200 of earthing potential bottom surfaces between distance can be less than electrode slice 440 and the Vcom equipotential layer in display module 200 and/or the distance arbitrarily between earthing potential layer.Such as, the electrode (not shown) for covering noise (noise) can be comprised between first polarizing layer 271 of display board 200 and the first glassy layer 261 as shown in Fig. 2 a to Fig. 2 c, cover and can be made up of indium tin oxide (ITO) with electrode, the effect of earthing potential layer can be played.
Fig. 6 e to Fig. 6 h is the pattern that can be applicable to the pressure electrode of first embodiment of the invention and the second embodiment respectively.In Fig. 6 e, pressure electrode 450,460 is attached to substrate 300, and the electric capacity between the first pressure electrode 450 and the second pressure electrode 460 can change with the distance between substrate 300 and pressure electrode 450,460.
Fig. 6 f and Fig. 6 g display can be applicable to the first pressure electrode 450 of the embodiment of the present invention and the another kind of pattern of the second pressure electrode 460.When changing by the mutual capacitance between the first pressure electrode 450 and the second pressure electrode 460 size detecting touch pressure, be necessary to make the pattern of the first pressure electrode 450 and the second pressure electrode 460 guarantee to generate the capacitance range improving and detect needed for degree of accuracy.When relative area between first pressure electrode 450 and the second pressure electrode 460 is larger or length is longer, the capacitance size of generation may be larger.Therefore, can according to relative area size, length and shape etc. between capacitance range adjusted design first pressure electrode 450 of necessity and the second pressure electrode 460.Fig. 6 f and Fig. 6 g is the situation that the first pressure electrode 450 and the second pressure electrode 460 are formed on identical layer, and display increases the situation of the length of the first pressure electrode 450 respect to one another and the second pressure electrode 460 as far as possible.
First pressure electrode 450 of the first embodiment and the second embodiment is formed at identical layer with the second pressure electrode 460, but according to another embodiment, the first pressure electrode 450 also can be made to be formed at different layers from the second pressure electrode 460.In Fig. 8, (a) shows attaching structure when the first pressure electrode 450 and the second pressure electrode 460 are formed at different layers.As shown in (a) in Fig. 8, the first pressure electrode 450 can be formed on the first insulation course 470, and the second pressure electrode 460 can be formed on the second insulation course 471 of being positioned on the first pressure electrode 450.According to embodiment, the second pressure electrode 460 can be covered with the 3rd insulation course 472.Herein, because the first pressure electrode 450 is positioned at different layers from the second pressure electrode 460, therefore can be arranged to overlap (overlap).Such as, the first pressure electrode 450 and the second pressure electrode 460 can be arranged to be similar in the touch-sensing plate 100 illustrated with reference to Fig. 1 according to the drive electrode TX of M × N structural arrangement and the pattern of receiving electrode RX.Herein, M and N can be the natural number of more than 1.
First embodiment is schematically illustrated to be changed by the mutual capacitance between the first pressure electrode 450 and the second pressure electrode 460 and detects touch pressure.But pressure electrode 450,460 can be made to only include any one pressure electrode in the first pressure electrode 450 and the second pressure electrode 460, in this case by detecting the capacitance variations between a kind of pressure electrode and ground plane (display module 200 or substrate 300), the size of touch pressure is detected.
Such as, the pressure electrode of Fig. 6 a can only include the first pressure electrode 450, the capacitance variations between the first pressure electrode 450 and substrate 300 caused can be changed herein by the distance between substrate 300 and the first pressure electrode 450, detect the size of touch pressure.Because distance d when touch pressure increases reduces, the electric capacity therefore between substrate 300 and the first pressure electrode 450 can increase along with the increase of touch pressure.This can be equally applicable to the relevant embodiment of Fig. 6 c.Herein, the shape of pressure electrode is not limited to improve mutual capacitance variable quantity and detects comb form needed for degree of accuracy or trident shape, can have plate (such as, Square consisting of two isosceles right-angled triangles) shape as shown in figure 6h.
In Fig. 8, (b) shows attaching structure when pressure electrode only includes the first pressure electrode 450.As shown in (b) in Fig. 8, the first pressure electrode 450 can be formed on the first insulation course 470.And according to embodiment, the first pressure electrode 450 can be covered with the second insulation course 471.
Fig. 7 a and Fig. 7 b is the schematic diagram of the relation between the touch pressure size that is subject to of touch input device of the present invention and saturated area.Fig. 7 a and Fig. 7 b show electrode sheet 440 are attached to the situation of substrate 300, but following explanation can also be applicable to the situation that electrode slice 440 is attached to display module 200.
When the size of touch pressure is enough large, the state that the precalculated position distance reached between electrode slice 440 and substrate 300 cannot be close further again, this state is called state of saturation.Such as shown in Figure 7a, when firmly f pressurizes touch input device 1000, electrode slice 440 contacts with substrate 300, and distance cannot be close further again.Herein, in Fig. 7 a, a on right side represents the contact area between electrode slice 440 and substrate 300.
If but continue in this state to strengthen touch pressure, the area of the state of saturation that the distance that can increase between substrate 300 and electrode slice 440 cannot be close further again.Such as shown in Figure 7b, when strengthening further with the contact area of substrate 300 with electrode slice 440 during the power F larger than f pressurization touch input device 1000.In Fig. 7 b, the A on right side represents the contact area between electrode slice 440 and substrate 300.Along with contact area increases, the mutual capacitance between the first pressure electrode 450 and the second pressure electrode 460 can reduce.Below illustrate that the capacitance variations by occurring during distance change calculates touch pressure size, the situation that can also comprise and calculate the size of touch pressure according to the change of the saturated area being in state of saturation is below described.
As mentioned above, according to the capacitance variations that the touch input device 1000 pressure sensor electrode 450,460 of the embodiment of the present invention occurs.Therefore, need to apply drive singal to the drive electrode in the first pressure electrode 450 and the second pressure electrode 460, need obtain sensing signal from receiving electrode and calculate touch pressure according to the variable quantity of electric capacity.According to embodiment, the touch-sensing IC worked for pressure detection module 400 can also be comprised in addition.In this case as shown in Figure 1, repeat the formation comprising drive division 120, detecting part 110 and control part 130 and so on, therefore may occur the area of touch input device 1000 and the problem of volume increase.
According to embodiment, touch input device 1000 can be accessed drive singal by the touch detecting apparatus worked for touch-sensing plate 100 and is received sensing signal to detect touch pressure.Below suppose that the first pressure electrode 450 is drive electrode, the second pressure electrode 460 is receiving electrode and is described.
For this reason, receive drive singal according to the first pressure electrode 450 in the touch input device 1000 of the embodiment of the present invention from drive division 120, sensing signal can be sent to detecting part 110 by the second pressure electrode 460.Scanning pressure detection module 400 while control part 130 can control to make scanning touch-sensing plate 100, or, control part 130 can generate control signal and makes timesharing and at very first time interval scanning touch-sensing plate 100, then scan pressure detection module 400 at the second time interval being different from very first time interval.
Therefore, the first pressure electrode 450 of the embodiment of the present invention and the second pressure electrode 460 should be made to be electrically connected with drive division 120 and/or detecting part 110.Herein, the touch detecting apparatus for touch-sensing plate 100 is touch-sensing IC150, is usually formed at one end of touch-sensing plate 100 or is formed on same plane with touch-sensing plate 100.The pattern of pressure electrode 450,460 can be electrically connected to the touch detecting apparatus of touch-sensing plate 100 by any means.Such as, the pattern of pressure electrode 450,460 can utilize the 2nd PCB210 in display module 200 and be connected to touch detecting apparatus by connector (connector).Such as, as shown in Fig. 5 a to 5d, the conducting wire extended from the first pressure electrode 450 and the second pressure electrode 460 electricity is respectively electrically connected to touch-sensing IC150 by the 2nd PCB210 etc.
Fig. 9 a and Fig. 9 b shows the adherence method of pressure electrode according to a second embodiment of the present invention.Fig. 9 a and Fig. 9 b shows the situation being attached to display module 200 bottom surfaces according to the pressure electrode 450,460 of the embodiment of the present invention.The bottom surfaces partial assembled that Fig. 9 a and Fig. 9 b shows display module 200 has the 2nd PCB210 of circuit needed for display board work.
Fig. 9 a shows the pattern of pressure electrode 450,460 and is attached to the bottom surfaces of display module 200 and the first pressure electrode 450 and the second pressure electrode 460 are connected to the situation of the 2nd PCB210 one end of display module 200.Herein, Fig. 9 a shows the first pressure electrode 450 and the second pressure electrode 460 and is formed at situation on insulation course 470.The pattern of pressure electrode 450,460 can be formed at bottom surfaces insulation course 470 being attached to display module 200 as the state of one-piece type electrode slice (sheet) 440.2nd PCB210 can be printed with the conductive pattern that the pattern of pressure electrode 450,460 can be electrically connected to the necessary components such as touch-sensing IC150.This part is described in detail with reference to Figure 10 a to Figure 10 c.
Fig. 9 b shows the situation that the first pressure electrode 450 and the second pressure electrode 460 are integrally formed at the 2nd PCB210 of display module 200.Such as, when making the 2nd PCB210 of display module 200, distribute predetermined area and circuit in advance needed for the work of typographical display plate and the pattern corresponding to the first pressure electrode 450 and the second pressure electrode 460 from the 2nd PCB210.In this case the 2nd PCB and display module 200 also can be made to be separated by preset distance, to be separated by make pressure electrode pattern 450,460 and display module.2nd PCB210 can be printed with the first pressure electrode 450 and the second pressure electrode 460 are electrically connected to the necessary conductive patterns formed such as touch-sensing IC150.
Figure 10 a to Figure 10 c shows according to a second embodiment of the present invention, pressure electrode is connected to the method for touch-sensing IC150.Figure 10 a to Figure 10 c shows the situation that touch-sensing plate 100 is positioned at display module 200 outside, and the touch detecting apparatus of display touch-sensing plate 100 is integrated in situation about being assemblied on a PCB160 of touch-sensing plate 100 work.
Figure 10 a shows the pressure electrode 450,460 being attached to display module 200 is connected to touch-sensing IC150 situation by the first connector 121.As shown in Figure 10 a, in the mobile communications device such as smart mobile phone, touch-sensing IC150 is connected to the 2nd PCB210 for display module 200 by the first connector (connector) 121.2nd PCB210 is electrically connected on mainboard by the second connector 221.Therefore, touch-sensing IC150 is by the first connector 121 and the second connector 221 and CPU or the AP receiving and transmitting signal worked for touch input device 1000.
Herein, Figure 10 a is shown pressure electrode 450,460 and is attached to the situation of display module 200 by mode shown in Fig. 9 b, but also can be suitable for the situation of being adhered to by mode as illustrated in fig. 9.2nd PCB210 can be formed through the conductive pattern that pressure electrode 450,460 is electrically connected to touch-sensing IC150 by the first connector 121.
Figure 10 b shows the pressure electrode 450,460 being attached to display module 200 is connected to touch-sensing IC150 situation by the 3rd connector 473.In Figure 10 b, pressure electrode 450,460 is connected to touch input device 1000 by the 3rd connector 473 and works required mainboard, then can be connected to touch-sensing IC150 by the second connector 221 and the first connector 121.Herein, pressure electrode 450,460 can be printed on the other PCB211 that is separated with the 2nd PCB210.Or according to another embodiment, insulation course 470 can be formed with the pattern of pressure electrode 450,460, extend conducting wire etc. from pressure electrode 450,460 and be connected to mainboard by the 3rd connector 473 etc.
The pattern of Figure 10 c display pressure electrode 450,460 is directly connected to the situation of touch-sensing IC150 by the 4th connector 474.In Figure 10 c, pressure electrode 450,460 can be connected to a PCB160 by the 4th connector 474.One PCB160 can be printed with the conductive pattern being electrically connected to touch-sensing IC150 from the 4th connector 474.Therefore, pressure electrode 450,460 can be electrically connected to touch-sensing IC150 by the 4th connector 474.Herein, pressure electrode 450,460 can be printed on the other PCB211 that is separated with the 2nd PCB210.2nd PCB210 and other PCB211 can prevent short circuit each other by insulation.Or, according to another embodiment, can on insulation course 470 mineralization pressure electrode 450,460 extend conducting wire etc. from pressure electrode 450,460, be connected to a PCB160 by the 4th connector 474.
The method of attachment of Figure 10 b and Figure 10 c is not only applicable to the situation that pressure electrode 450,460 is formed at display module 200 bottom surfaces, is also applicable to be formed at the situation on substrate 300.
Figure 10 a to Figure 10 c supposes that touch-sensing IC150 is formed at and a PCB160 covers brilliant film (chiponfilm; COF) structure being illustrated.But this only illustrates, the present invention can also be applicable to the chip on board (chiponboard in assembly space 310 that touch-sensing IC150 is assemblied in touch input device 1000 on mainboard; COB) structure.According to the explanation about Figure 10 a to Figure 10 c, also by connector Bonding pressure electrode 450,460 when those of ordinary skill in the art easily expect other embodiments.
The first pressure electrode 450 be explained above as drive electrode forms a channel and forms the pressure electrode 450,460 of a channel as the second pressure electrode 460 of receiving electrode.But this just illustrates, those skilled in the art can make drive electrode and receiving electrode form multiple channel respectively in other embodiments and detect multiple pressure when multi-touch (multitouch).
Figure 11 a to Figure 11 c shows the situation forming multiple channel according to the pressure electrode of the embodiment of the present invention.Figure 11 a display forms the situation of two channels respectively according to first pressure electrode 450-1,450-2 of another embodiment and second pressure electrode 460-1,460-2.Figure 11 b shows the first pressure electrode 450 and forms two channels 450-1,450-2, and the second pressure electrode 460 forms the situation of a channel.Figure 11 c shows the situation that the first pressure electrode 450-1 to 450-5 and the second pressure electrode 460-1 to 460-5 forms five channels respectively.
Figure 11 a to Figure 11 c shows the situation that pressure electrode forms single or multiple channel, pressure electrode can be made to form single or multiple channel by multiple method.The not shown pressure electrode 450,460 of Figure 11 a to Figure 11 c is electrically connected on the situation of touch-sensing IC150, but by Figure 10 a to Figure 10 c and additive method, pressure electrode 450,460 can be connected to touch-sensing IC150.
Figure 12 is the coordinate diagram corresponding to the capacitance change of object grammes per square metre (gramforce) that display is obtained according to the experiment of the touch-surface central part of the touch input device 1000 of the embodiment of the present invention by non-conductive object pressurization.As shown in Figure 12, the power of the touch-surface central part of the touch input device 1000 of the pressurization embodiment of the present invention is larger, and the capacitance change of the pattern of the pressure electrode 450,460 in pressure detection module 400 is larger.
Pressure detection module 400 described above is condenser type detection module, but utilizes the pressure detection module that can adopt any-mode when separation layer 420 and pressure electrode 450,460 according to the touch input device 1000 of the embodiment of the present invention in pressure detection module 400.
Feature, structure, effect etc. illustrated in the various embodiments described above are contained at least one embodiment of the present invention, but are not only defined in an embodiment.Further, the feature shown in each embodiment, structure, effect etc. can be combined other embodiments by embodiment those of ordinary skill in the field or be out of shape enforcement.Therefore, should be considered as being contained in scope of the present invention with the content of distortion about these combinations.
And, be illustrated centered by embodiment above, but these are only illustrate, not the present invention is limited, those skilled in the art, in the scope of intrinsic propesties not exceeding the present embodiment, can also carry out above NM various deformation and application.Such as, in embodiment, the concrete each inscape deformable occurred is implemented.Further, about these distortion should be considered as being contained in technical scheme of the present invention with the discrepancy of application.

Claims (36)

1. a touch input device, can detect the touch pressure putting on touch-surface, it is characterized in that, comprise:
Substrate;
Display module, it comprises display board; And
Electrode, it is between described substrate and described display board and be fixed on described substrate,
Wherein, the described touch that the distance between described electrode and described substrate can be subject to because of described touch-surface and changing, described distance can with the size variation of described touch pressure,
Described electrode can export the electronic signal of the change corresponding to described distance.
2. touch input device according to claim 1, is characterized in that:
Between described electrode and described substrate, there is separation layer.
3. touch input device according to claim 2, is characterized in that:
Described electrode comprises the first electrode and the second electrode, and the electric capacity between described first electrode and described second electrode changes with described distance.
4. touch input device according to claim 2, is characterized in that:
Electric capacity between described electrode and described substrate changes with described distance.
5. touch input device according to claim 2, is characterized in that:
Described electrode is between the first insulation course and the second insulation course.
6. touch input device according to claim 5, is characterized in that:
Described electrode between described first insulation course and described second insulation course has one-piece type electrode slice shape, and is fixed on described substrate with described first insulation course together with described second insulation course.
7. touch input device according to claim 5, is characterized in that:
Described electrode is after on described first insulation course, configuration has the mask of the through hole corresponding with the pattern of described electrode, is formed by injection conduction spray.
8. touch input device according to claim 2, is characterized in that, also comprises:
Touch-sensing plate, it can detect the position of the described touch that described touch-surface is subject to; And
First printed circuit board (PCB), it is equipped with the touch-sensing circuit for the work of described touch-sensing plate,
Wherein, described touch-sensing plate is attached to tossing about on face of face relative with described substrate in described display module.
9. touch input device according to claim 2, is characterized in that, also comprises:
Touch-sensing plate, it can detect the position of the described touch that described touch-surface is subject to; And
First printed circuit board (PCB), it is equipped with the touch-sensing circuit for the work of described touch-sensing plate,
Wherein, what described touch-sensing plate was attached to face relative with described substrate in described display module tosses about on face,
Described display module also comprises the second printed circuit board (PCB) of the control circuit be equipped with for described display board work,
Described touch input device also comprises the connector between described first printed circuit board (PCB) and described second printed circuit board (PCB),
Described electrode is electrically connected on described touch-sensing circuit by described connector.
10. touch input device according to claim 8, is characterized in that:
Described display module also comprises the second printed circuit board (PCB) of the control circuit be equipped with for described display board work,
Described electrode is formed at other circuit board,
Described touch input device also comprises the connector between described other circuit board and described first printed circuit board (PCB),
Described electrode is electrically connected on described touch-sensing circuit by described connector.
11. touch input devices according to claim 8, is characterized in that:
Described display module also comprises the second printed circuit board (PCB) of the control circuit be equipped with for described display board work, and described electrode is formed at other circuit board,
Described touch input device also comprises:
First connector, it is between described first printed circuit board (PCB) and described second printed circuit board (PCB);
Second connector, it is between described second printed circuit board (PCB) and the mainboard being equipped with for the CPU (central processing unit) of described touch input device work; And
3rd connector, it is between described other circuit board and described mainboard,
Described electrode is electrically connected on described touch-sensing circuit by described first connector, described second connector and described 3rd connector.
12. touch input devices according to claim 1, is characterized in that:
Described touch-surface is subject to described touch and reaches the size variation of area with described touch pressure of the state of saturation that described distance no longer reduces.
13. touch input devices according to claim 1, is characterized in that:
Described electrode forms multiple channel.
14. touch input devices according to claim 13, is characterized in that:
The multiple pressure of described multiple Channel Detection multi-touch can be utilized.
15. touch input devices according to claim 6, is characterized in that:
Described electrode forms multiple channel.
16. touch input devices according to claim 15, is characterized in that:
The multiple pressure of described multiple Channel Detection multi-touch can be utilized.
17. touch input devices according to claim 1, is characterized in that:
Described display module bends with described touch,
Distance between described electrode and described substrate can bend with described display module and change.
18. 1 kinds of touch input devices, can detect the touch pressure putting on touch-surface, it is characterized in that, comprise:
Substrate;
Display module, it comprises display board; And
Electrode, it is between described substrate and described display board and be fixed on described display module,
Wherein, the described touch that the distance between described electrode and described display module can be subject to because of described touch-surface and changing, described distance can with the size variation of described touch pressure,
Described electrode can export the electronic signal of the change corresponding to described distance.
19. touch input devices according to claim 18, is characterized in that:
Between described electrode and described display module, there is separation layer.
20. touch input devices according to claim 19, is characterized in that:
Described electrode comprises the first electrode and the second electrode, and the electric capacity between described first electrode and described second electrode changes with described distance.
21. touch input devices according to claim 19, is characterized in that:
Electric capacity between described electrode and described display module changes with described distance.
22. touch input devices according to claim 19, is characterized in that:
Described electrode is between the first insulation course and the second insulation course.
23. touch input devices according to claim 22, is characterized in that:
Described electrode between described first insulation course and described second insulation course has one-piece type electrode slice shape, and is fixed on described display module with described first insulation course together with described second insulation course.
24. touch input devices according to claim 22, is characterized in that:
Described electrode is after on described first insulation course, configuration has the mask of the through hole corresponding with the pattern of described electrode, is formed by injection conduction spray.
25. touch input devices according to claim 19, is characterized in that, also comprise:
Touch-sensing plate, it can detect the position of the described touch that described touch-surface is subject to; And
First printed circuit board (PCB), it is equipped with the touch-sensing circuit for the work of described touch-sensing plate,
Wherein, described touch-sensing plate is attached to tossing about on face of face relative with described substrate in described display module.
26. touch input devices according to claim 19, is characterized in that:
Described display module also comprises the second printed circuit board (PCB) of the control circuit be equipped with for described display board work,
Described electrode print is in described second printed circuit board (PCB).
27. touch input devices according to claim 19, is characterized in that, also comprise:
Described display module also comprises the second printed circuit board (PCB) of the control circuit be equipped with for described display board work,
Described electrodes is in described display module and be electrically connected with the conductive pattern being printed in described second printed circuit board (PCB).
28. touch input devices according to claim 26 or 27, is characterized in that, also comprise:
Touch-sensing plate, it can detect the position of the described touch that described touch-surface is subject to; And
First printed circuit board (PCB), it is equipped with the touch-sensing circuit for the work of described touch-sensing plate,
Wherein, what described touch-sensing plate was attached to face relative with described substrate in described display module tosses about on face,
Described touch input device also comprises the connector between described first printed circuit board (PCB) and described second printed circuit board (PCB),
Described electrode is electrically connected on described touch-sensing circuit by described connector.
29. touch input devices according to claim 25, is characterized in that:
Described display module also comprises the second printed circuit board (PCB) of the control circuit be equipped with for described display board work,
Described electrode is formed at other circuit board,
Described touch input device also comprises the connector between described other circuit board and described first printed circuit board (PCB),
Described electrode is electrically connected on described touch-sensing circuit by described connector.
30. touch input devices according to claim 25, is characterized in that:
Described display module also comprises the second printed circuit board (PCB) of the control circuit be equipped with for described display board work, and described electrode is formed at other circuit board,
Described touch input device also comprises:
First connector, it is between described first printed circuit board (PCB) and described second printed circuit board (PCB);
Second connector, it is between described second printed circuit board (PCB) and the mainboard being equipped with for the CPU (central processing unit) of described touch input device work; And
3rd connector, it is between described other circuit board and described mainboard,
Described electrode is electrically connected on described touch-sensing circuit by described first connector, described second connector and described 3rd connector.
31. touch input devices according to claim 18, is characterized in that:
Described touch-surface is subject to described touch and reaches the size variation of area with described touch pressure of the state of saturation that described distance no longer reduces.
32. touch input devices according to claim 18, is characterized in that:
Described electrode forms multiple channel.
33. touch input devices according to claim 32, is characterized in that:
The multiple pressure of described multiple Channel Detection multi-touch can be utilized.
34. touch input devices according to claim 23, is characterized in that:
Described electrode forms multiple channel.
35. touch input devices according to claim 34, is characterized in that:
The multiple pressure of described multiple Channel Detection multi-touch can be utilized.
36. touch input devices according to claim 18, is characterized in that:
Described display module bends with described touch,
Distance between described electrode and described display module can bend with described display module and change.
CN201510703555.7A 2014-10-24 2015-10-26 Touch input apparatus Pending CN105278750A (en)

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